Asked by simone

Find the exact ratio of the equator to the distance around the Earth at latitude 45 degrees north. (Assume the Earth is a perfect sphere.)
Answered by Steve
If R is the radius at the equator, then
let r be the radius at 45°. That is Rcos45° = R/√2

So, the ratio is R/r = √2
Answered by anna
square root 2:1
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